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https://github.com/FFmpeg/FFmpeg.git
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161 lines
4.7 KiB
C
161 lines
4.7 KiB
C
/*
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Copyright (C) 2001-2002 Michael Niedermayer <michaelni@gmx.at>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* values for the flags, the stuff on the command line is different */
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#define SWS_FAST_BILINEAR 1
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#define SWS_BILINEAR 2
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#define SWS_BICUBIC 4
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#define SWS_X 8
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#define SWS_POINT 0x10
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#define SWS_AREA 0x20
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#define SWS_BICUBLIN 0x40
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#define SWS_GAUSS 0x80
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#define SWS_SINC 0x100
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#define SWS_LANCZOS 0x200
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#define SWS_SPLINE 0x400
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#define SWS_SRC_V_CHR_DROP_MASK 0x30000
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#define SWS_SRC_V_CHR_DROP_SHIFT 16
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#define SWS_PARAM_MASK 0x3FC0000
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#define SWS_PARAM_SHIFT 18
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#define SWS_PRINT_INFO 0x1000
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//the following 3 flags are not completly implemented
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//internal chrominace subsamling info
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#define SWS_FULL_CHR_H_INT 0x2000
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//input subsampling info
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#define SWS_FULL_CHR_H_INP 0x4000
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#define SWS_DIRECT_BGR 0x8000
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#define SWS_MAX_REDUCE_CUTOFF 0.002
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/* this struct should be aligned on at least 32-byte boundary */
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typedef struct SwsContext{
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int srcW, srcH, dstW, dstH;
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int chrSrcW, chrSrcH, chrDstW, chrDstH;
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int lumXInc, chrXInc;
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int lumYInc, chrYInc;
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int dstFormat, srcFormat;
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int chrSrcHSubSample, chrSrcVSubSample;
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int chrIntHSubSample, chrIntVSubSample;
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int chrDstHSubSample, chrDstVSubSample;
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int vChrDrop;
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int16_t **lumPixBuf;
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int16_t **chrPixBuf;
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int16_t *hLumFilter;
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int16_t *hLumFilterPos;
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int16_t *hChrFilter;
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int16_t *hChrFilterPos;
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int16_t *vLumFilter;
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int16_t *vLumFilterPos;
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int16_t *vChrFilter;
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int16_t *vChrFilterPos;
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// Contain simply the values from v(Lum|Chr)Filter just nicely packed for mmx
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int16_t *lumMmxFilter;
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int16_t *chrMmxFilter;
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uint8_t formatConvBuffer[4000]; //FIXME dynamic alloc, but we have to change alot of code for this to be usefull
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int hLumFilterSize;
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int hChrFilterSize;
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int vLumFilterSize;
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int vChrFilterSize;
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int vLumBufSize;
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int vChrBufSize;
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uint8_t __attribute__((aligned(32))) funnyYCode[10000];
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uint8_t __attribute__((aligned(32))) funnyUVCode[10000];
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int32_t *lumMmx2FilterPos;
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int32_t *chrMmx2FilterPos;
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int16_t *lumMmx2Filter;
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int16_t *chrMmx2Filter;
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int canMMX2BeUsed;
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int lastInLumBuf;
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int lastInChrBuf;
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int lumBufIndex;
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int chrBufIndex;
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int dstY;
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int flags;
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void * yuvTable;
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void * table_rV[256];
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void * table_gU[256];
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int table_gV[256];
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void * table_bU[256];
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void (*swScale)(struct SwsContext *context, uint8_t* src[], int srcStride[], int srcSliceY,
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int srcSliceH, uint8_t* dst[], int dstStride[]);
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} SwsContext;
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//FIXME check init (where 0)
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// when used for filters they must have an odd number of elements
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// coeffs cannot be shared between vectors
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typedef struct {
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double *coeff;
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int length;
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} SwsVector;
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// vectors can be shared
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typedef struct {
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SwsVector *lumH;
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SwsVector *lumV;
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SwsVector *chrH;
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SwsVector *chrV;
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} SwsFilter;
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// *** bilinear scaling and yuv->rgb & yuv->yuv conversion of yv12 slices:
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// *** Note: it's called multiple times while decoding a frame, first time y==0
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// dstbpp == 12 -> yv12 output
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// will use sws_flags
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void SwScale_YV12slice(unsigned char* src[],int srcStride[], int srcSliceY,
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int srcSliceH, uint8_t* dst[], int dstStride, int dstbpp,
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int srcW, int srcH, int dstW, int dstH);
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// Obsolete, will be removed soon
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void SwScale_Init();
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void freeSwsContext(SwsContext *swsContext);
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SwsContext *getSwsContextFromCmdLine(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat);
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SwsContext *getSwsContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags,
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SwsFilter *srcFilter, SwsFilter *dstFilter);
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void swsGetFlagsAndFilterFromCmdLine(int *flags, SwsFilter **srcFilterParam, SwsFilter **dstFilterParam);
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SwsVector *getGaussianVec(double variance, double quality);
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SwsVector *getConstVec(double c, int length);
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SwsVector *getIdentityVec(void);
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void scaleVec(SwsVector *a, double scalar);
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void normalizeVec(SwsVector *a, double height);
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void convVec(SwsVector *a, SwsVector *b);
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void addVec(SwsVector *a, SwsVector *b);
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void subVec(SwsVector *a, SwsVector *b);
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void shiftVec(SwsVector *a, int shift);
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SwsVector *cloneVec(SwsVector *a);
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void printVec(SwsVector *a);
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void freeVec(SwsVector *a);
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